All categories

3 years ago

What is the purpose of a primary key?

Computers and Technology

1 answer:

tia_tia [17]3 years ago

4 0

Answer:

Primary key:

A primary key is the collection of field value which persist unique value in the table. The primary key value can be use to represent the entire record throughout the table. In the database, each table only contain one primary key.

The purpose of the primary key is used to implemented the relationship within the two tables in the database. More explicitly the primary key is define as, primary key is "target" that the foreign key can easily referenced. It basically consist multiple attributes in the table.

You might be interested in

Which is a sentence fragment?

ehidna [41]

C is a sentence fragment it does not have a verb

5 0

4 years ago

Help pls put them in order for me??

Natalija [7]

Answer: i can't see the hole thing?

Explanation:

3 0

3 years ago

Read 2 more answers

Write two statements to get input values into birthMonth and birthYear. Then write a statement to output the month, a slash, and

Montano1993 [528]

Answer:

1/2000

Explanation:

import java.util.Scanner;

public class InputExample {

public static void main(String [] args) {

Scanner scnr = new Scanner(System.in);

System.out.print("Enter birth month and date:");//comment this line if not needed

int birthMonth=scnr.nextInt();

int birthYear=scnr.nextInt();

String output= birthMonth+"/"+birthYear+"\n";

System.out.println(output);

}

if using this code the out put should be 1/2000

5 0

3 years ago

____________________ is like a set of instructions that helps hardware process data into information.

Arte-miy333 [17]

Answer:

Program

Explanation:

Program is like a set of instructions that helps hardware process data into information.

Every hardware needs a program to process data into information.

For example take the example of a data processing software like MS Excel.

You open a spreadsheet and enter some data into your sheet. and then ask the program to do some calculations with this data and give you output results. The spreadsheet software does this processing in the background for you and provides you the results.

Without program a hardware doesn't know what to do with the data. Therefore, a program is like a instruction set that guides the hardware what to do with the data.

Note: The terms software and program are usually used together but there is a difference between software and program

A software is a generalized term and program is more like a specific term.

software can be made up of several different programs which performs many different tasks. On the other hand, a program only carry out a specific task or set of instructions.

3 0

3 years ago

Which of the following processes should Angel use to merge cells A1:D4 to create a title?

podryga [215]

Answer:

Highlight cells A1:D4, right-click and select Format Cells, click Alignment, and choose the Merge cells option.

Explanation:

We merge cells with the help of following methods.

Method 1

Highlight cells A1:D4
click on the Home tab
click on the Merge and Center icon in the Alignment group

1st method is not given in options of question.

Method 2

Highlight cells A1:D4
right-click and select Format Cells
click Alignment
choose the Merge cells option

2nd method is matching with option D. So, Option D is the answer.

6 0

3 years ago